package com.can.Lock;

//死锁：多个线程互相抱着对方需要的资源，然后形成僵持
public class DeadLock {

    public static void main(String[] args) {
        Makeup g1 = new Makeup(0,"灰姑凉");
        Makeup g2 = new Makeup(1,"白雪公主");


        g1.start();
        g2.start();
    }
}

//口红
class Lipstick{

}

//镜子
class Mirror{

}

class Makeup extends Thread{

    //需要的资源只有一份，用static来保证只有一份
    static Lipstick lipstick = new Lipstick();
    static Mirror mirror = new Mirror();

    int choice; //选择
    String girlName; //使用化妆品的人

    Makeup(int choice,String girlName){
        this.choice = choice;
        this.girlName = girlName;
    }
    @Override
    public void run() {
        //化妆
        try {
            makeup();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

    //化妆：互相持有对方的锁，就是需要拿到对方的资源
    private void makeup() throws InterruptedException {
        if (choice==0){
            synchronized (lipstick){ //获得口红的锁
//                System.out.println(this.girlName+"获得口红的锁");
                System.out.println(Thread.currentThread().getName()+"获得口红的锁");
                Thread.sleep(1000);
                synchronized(mirror){ //一秒钟后想获得镜子
                    System.out.println(this.girlName+"获得镜子的锁");
                }
            }
        }else{
            synchronized (mirror){ //获得镜子的锁
                System.out.println(this.girlName+"获得口红的锁");
                Thread.sleep(2000);
                synchronized(lipstick){ //一秒钟后想获得口红
                    System.out.println(this.girlName+"获得镜子的锁");
                }
            }
        }
    }
}
